Image Forming Apparatus, Image Forming Method, and Image Forming System with Rewritable Print and Permanent Print Function

1. An image forming apparatus comprising: a job creation unit that creates and transmits an image forming job, including: a receiver configured to receive a request of print setting to an image to be printed, a display configured to display a setting screen having a setting unit to selectively designate setting either a rewritable print or permanent print for each page in response to receiving the request of print setting, and a memory configured to store an image forming job that includes the setting of either rewritable print or permanent print for each page as set by operating the setting screen and the image; and an image forming unit configured to receive the image forming job from the job creation unit, to receive one or more sheets decolored by a decoloring device, and to form images on the decolored sheets based on the image forming job, the image forming unit including: a first image forming unit configured to form rewritable print images by discharging a decolorable colorant onto the decolored sheet in case the setting designates rewritable print, and a second image forming unit configured to form permanent print images by discharging a non-decolorable colorant onto the decolored sheet in case the setting designates permanent print, wherein the colorant is either one of ink or toner, and wherein the image includes a plurality of pages, the setting screen further includes a setting unit to designate a duplex print, the memory further stores the setting of the duplex print, and the setting screen further displays a warning that a sheet is set with one side by rewritable print and the other side by permanent print based on the setting stored in the memory.

2. The image forming apparatus according to claim 1 , wherein the setting screen further includes a setting unit to designate a setting of rewritable print or permanent print per segment in a page, and the memory further stores the setting of rewritable print or permanent print per segment in the page set by operating the setting screen.

3. The image forming apparatus according to claim 1 , wherein the setting screen further includes a thumbnail image and includes an indication unit to change the thumbnail image in appearance or add an indicator to the thumbnail image in response to the setting set by operating the setting screen.

4. The image forming apparatus of claim 1 , further comprising a supply tray configured to supply unused sheets to the first image forming unit or the second image forming unit based on the image forming job.

5. The image forming apparatus of claim 1 , wherein the first image forming unit forms rewritable print images on the decolored sheet irrespective of the type of sheet.

6. The image forming apparatus of claim 1 , wherein the first image forming unit comprises photoconductive drums, and the second image forming unit comprises print heads storing decolorable colorant.

7. An image forming method comprising: receiving a request of print setting to an image to be printed; displaying a setting screen having a setting unit to selectively designate setting either a rewritable print or permanent print for each page at a display in response to receiving the request of print setting; storing, in a memory, the setting of rewritable print or permanent print for each page set by operating the setting screen and the image as an image forming job; receiving, by an image forming unit, the image forming job; receiving, by the image forming unit, one or more sheets decolored by a decoloring device; forming images on the decolored sheets based on the image forming job, comprising forming, by a first image forming unit, rewritable print images by discharging a decolorable colorant onto the decolored sheet in case the setting designates rewritable print, and forming, by a second image forming unit, permanent print images by discharging a non-decolorable colorant onto the decolored sheet in case the setting designates permanent print, wherein the colorant is either one of ink or toner, and wherein the image includes a plurality of pages, the setting screen further includes a setting unit to designate a duplex print, the memory further stores the setting of the duplex print, and the setting screen further displays a warning that a sheet is set with one side by rewritable print, and the other side by permanent print based on the setting stored in the memory.

8. The image forming method according to claim 7 , wherein the setting screen further includes a setting unit to designate a setting of rewritable print or permanent print per segment in a page, and the memory further stores the setting of rewritable print or permanent print per segment in the page set by operating the setting screen.

9. The image forming method according to claim 7 , wherein the setting screen further includes a thumbnail image and includes an indication unit to change the thumbnail image in appearance or add an indicator to the thumbnail image in response to the setting set by operating the setting screen.

10. The image forming method of claim 7 , further comprising supplying unused sheets to the first image forming unit or the second image forming unit based on the image forming job.

11. The image forming method of claim 7 , wherein the first image forming unit forms rewritable print images on the decolored sheet irrespective of the type of sheet.

12. The image forming method of claim 7 , wherein the first image forming unit comprises photoconductive drums, and the second image forming unit comprises print heads storing decolorable colorant.

13. An image forming system comprising: a job creation unit that creates and transmits an image forming job, including: a receiver that receives a request of print setting to an image to be printed; a display that displays a setting screen having a setting unit to selectively designate setting either a rewritable print or permanent print for each page in response to receiving the request of print setting; and a memory that stores the setting of rewritable print or permanent print for each page set by operating the setting screen and the image as the image forming job; an image forming unit configured to receive the image forming job from the job creation unit, to receive one or more sheets decolored by a decoloring device, and to form images on the decolored sheets based on the image forming job, the image forming unit including: a first image forming unit configured to form rewritable print images by discharging a decolorable colorant onto the decolored sheet in case the setting designates rewritable print, and a second image forming unit configured to form permanent print images by discharging a non-decolorable colorant onto the decolored sheet in case the setting designates permanent print, wherein the colorant is either one of ink or toner, and wherein the image includes a plurality of pages, the setting screen further includes a setting unit to designate a duplex print, the memory further stores the setting of the duplex print, and the setting screen further displays a warning that a sheet is set with one side by rewritable print and the other side by permanent print based on the setting stored in the memory.

14. The image forming system according to claim 13 , wherein the setting screen further includes a setting unit to designate a setting of rewritable print or permanent print per segment in a page, and the memory further stores the setting of rewritable print or permanent print per segment in the page set by operating the setting screen.

15. The image forming system according to claim 13 , wherein the setting screen further includes a thumbnail image and includes an indication unit to change the thumbnail image in appearance or add an indicator to the thumbnail image in response to the setting set by operating the setting screen.

16. The image forming system of claim 13 , further comprising a supply tray configured to supply unused sheets to the first image forming unit or the second image forming unit based on the image forming job.

17. The image forming system of claim 13 , wherein the first image forming unit forms rewritable print images on the decolored sheets irrespective of the type of sheets.

18. The image forming system of claim 13 , wherein the first image forming unit comprises photoconductive drums, and the second image forming unit comprises print heads storing decolorable colorant.